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Birds have evolved from the same common ancestor as reptiles, they have many homologous characteristics. What makes them different however is that birds have hollow bones and many other key characteristics to make them lighter. They do not defy gravity, they are lighter and spread that light body weight over a great volume of air to support their mass.

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What chemical that can defy gravity?

The chemical that is called defying gravity.


How did Isaac Newton create gravity?

Isaac Newton did not create gravity. Gravity has always existed. He did experiments and tests about gravity. Newton wrote Newton's Law of Gravitation, but create... nope. Look up his law for more info.


Why does Ricky Rick from the Kumbia all-starz always wear sunglasses?

because he is just like chuck norris, if he took off his glasses there would be another dimension of sexiness and we would defy gravity and physics looking at him


Can OJ Simpson be re-tried for their murder if he admitted it today?

Under the 'double jeopardy' law Simpson can't be tried again for these murders even if he wrote a book explaining how he did it. Which he did. This law limits the power of overzealous prosecutors and is an important part of our judicial system. But the system is not perfect and there are situations like Simpson's that seem to defy logic. Unfortunately, sometimes individuals can get away with murder.


Are there places that defy law of gravity?

Not really.So far, everything humans has found is affected by gravity, and reacts to it infairly well understood ways.Gravity is basically about how objects with mass pulls on each other. It's a forcethat's dependent on the product of the masses involved, and the distancebetween them.Humans pull on Earth the same way as Earth pulls on humans.If you're in space, you're a far, far away from anything heavy. The situationhas nothing to do with defying gravity, but due to the distances involved, wedon't notice it that much. But it's still there, doing its thing, entirely accordingto the textbook.Then there is the Zero-G flight, but that's not about defying gravity either.Rather about understanding it, using it and countering it to create free-fallconditions. And while seemingly very similar, free-fall and zero gravity aren'tthe same thing.By having a plane follow the same trajectory and speed as - say a thrown stone -everything within the plane becomes weightless WRT the plane, for the descentpart of the trajectory, for about 20 seconds.Apart from the plane being able to land, it's like being inside a falling elevator.If you and the elevator are both falling at the same rate, there's no longer anyforce pushing you against the floor.Zero gravity is hard, and not really found anywhere inside out solar system.Zero gravity means there's no force acting on you at all. Free fall is a lot easier,and simply means that you and your immediate surroundings are free to reactthe same way to the pull of gravity.